Tool handle



Oct. 9 1923.

. W. R. PORTER TOOL HANDLE Filed Sent. 23. 1920 iii? WILL R. PORTER, on rnmcs BAY, NEW YORK, sis-sienna To THE s. s. WHITE DENTAL IYIANUFACTURINGVCOMPANY, A CORPORATION OF PENNSYLVANIA.

TOOL HAIVIDLE."

Application filed September 23, 1920. Serial No. 412,334.

To aZZ whom it may 007206771.

Be it known that I, WILL R. Ponrnn, a

53 Nate of Ziew fork, have invented certain new and useful improvements in Tool Tl dies, of which the following is a specifica i'ion, tcrence being had to the accompany lug drawings. v I Mv invention relates particularly to tool. handles having finger-holds or hand holds wherein the surface is proi'ided with knurl- Zng to prevent the hand or lingers slipping *hereon, and is especially directed to the :in of knurling employed. I it has been the practice to form knurlinnfor handles having finger-holds or hand- 1. my ing or cutting the surface of handle to provide parallel intersecting; t-saaped scores which formed an infinite number of pyramidal projections the points ill of whit-hare adapted to engage the hand or 1 fingers ot the operator to prevent slipping.

it is the purpose of my invention to proride a hand having'finger-holdsior handheld with i rling which will greatly increas the tire effect and afford a firmer i ringer-holds with knurlinn' formed by gong g'flor cutting parallel aid intersecting grooves-of semicylindrical e-(ntaml having their axes so spaced as to afford an infinite number. of

substantia ly sharp ed invention also inclndesa i s novel features-of construction an iias hereinafter more definitely e elevationa-l View ofa dpiecc having its han i vention; 2 is an e ratio-na l view snow rug depicted in s a fragmentary sectional I the ictnre shown i Fig. 2, taken on the in said fignre; and Fig.3} is a Qnentary sectional view taken on the iin 2.- V I In said figures, the handpie'ce comprises ico the United States, and a residentj or Prince Bay n the county of Richmond i accordance with my invention.

described provides a.

flat surfaces s) sp ce-a as 'hoinh idal n provide an infinite number oflfiat surfaces 5, pr feraloly rhomhoidal, and having sharp edges against which the hand or fingers of the operator hear, and Which afford such resistance to prevent any possible slippage oi the hand or'fingers of the operator thereon:

It may be here noted that in knurling having the pyramidal prjections,'the hand or lingers 01 the operator tend to ride upthe inclined Walls. or said pyramidal projections and are only engaged by the pointsthereot Whit i atlordjinsuiiicient surface tolproperly I;

quires that the operator grasp said knurlquiz-ed in grasping the knurling constructed i do not desire to limit my inventionto the precise details. oiconst-ructron and ar- Jrangement as herein set forth, asit is ob? vions that various modifications may he 7 made therein Withoutdeparting from the essential. "features of my invention'as de Having claim r I. V

l. A tool handle comprising a finger-hold having-a plurality or 'intersecting grooves, so spaced'as to form plurality ofrninut-z su faces of approximately equal. dimensions Lg the hand or fingers of the operator, T

therefore, to prevent'slippage, it rc 7 ii *ith a much greater effort. than is re 1 v1 h said grooyes an'd atiordizigisharp sub-f right angled edges,

stantially 7 t v r 3 tool handle comprlsu a fingenhold di'rriensions; x r 1 V thciinacnte 'angleg directed-1n planes coincnt' Wlili .il1 axis Of'SaICl'i-QOl' handle.

'Witnesisesf i q Q SAMUEL R. BART N,

aplu iality of intersecting;grooveg. pii' i rality oi niiniitr .iace's of approximately equal 1thsaidgrooves andfhavingf j r in Witness-whereof, I have hereunto set myhand this21st day of September; A D.,-

a. ron rnng. 

